I think this budget stuff is misapplied information.
We aren't talking operational budgets here.. but capital investments funded out of money that has long been targeted for this type of expense. Money spent on 'investment' is generally tax favorable for a company, not a burden. The actual expenses to create the product are depreciated over decades.
People do this sort of 'stalling' to massage their cash flow situation. TWDC doesn't have a cash flow situation that would require a few million dollars in capex to be monkey'd around with at the huge expense of higher costs and greater guest impact. That's why I think all this speculation is just bunk. This isn't a small group managing their cashflow or quarterly PNL.. these are massive capex projects funded with their own money streams.
It's simply going to take them that long to build it based on how they work and the environment they have around them. Just look at other ongoing projects like BVS... they had total isolation, work during the day, and its still taking them ages just to build some store fronts.
The money itself is already spent over a long period simply because you don't spend all the money at once. Some is personnel, some is R&D, some is design, some is prototyping, some is construction design, some is outsourced materials, some is construction cost itself, some is finishing, etc.